参数资料
型号: PIC16F505-I/MG
厂商: Microchip Technology
文件页数: 9/44页
文件大小: 0K
描述: MCU PIC 1.5K FLASH 3X3 16QFN
产品培训模块: 8-bit PIC® Microcontroller Portfolio
标准包装: 120
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
外围设备: POR,WDT
输入/输出数: 11
程序存储器容量: 1.5KB(1K x 12)
程序存储器类型: 闪存
RAM 容量: 72 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 16-VFQFN 裸露焊盘
包装: 托盘
产品目录页面: 638 (CN2011-ZH PDF)
2009 Microchip Technology Inc.
DS41236E-page 17
PIC12F508/509/16F505
4.0
MEMORY ORGANIZATION
The PIC12F508/509/16F505 memories are organized
into program memory and data memory. For devices
with more than 512 bytes of program memory, a paging
scheme is used. Program memory pages are accessed
using one STATUS register bit. For the PIC12F509 and
PIC16F505, with data memory register files of more
than 32 registers, a banking scheme is used. Data
memory banks are accessed using the File Select
Register (FSR).
4.1
Program Memory Organization for
the PIC12F508/509
The PIC12F508 device has a 10-bit Program Counter
(PC) and PIC12F509 has a 11-bit Program Counter
(PC) capable of addressing a 2K x 12 program memory
space.
Only the first 512 x 12 (0000h-01FFh) for the
PIC12F508, and 1K x 12 (0000h-03FFh) for the
PIC12F509
are
physically
implemented
(see
Figure 4-1). Accessing a location above these
boundaries will cause a wrap-around within the first
512 x 12 space (PIC12F508) or 1K x 12 space
(PIC12F509). The effective Reset vector is a 0000h
(see Figure 4-1). Location 01FFh (PIC12F508) and
location 03FFh (PIC12F509) contain the internal
clock oscillator calibration value. This value should
never be overwritten.
FIGURE 4-1:
PROGRAM MEMORY MAP
AND STACK FOR THE
PIC12F508/509
CALL, RETLW
PC<11:0>
Stack Level 1
Stack Level 2
User
Mem
o
ry
Sp
a
c
e
12
0000h
7FFh
01FFh
0200h
On-chip Program
Memory
Reset Vector(1)
Note
1:
Address 0000h becomes the
effective Reset vector. Location
01FFh, 03FFh (PIC12F508,
PIC12F509) contains the MOVLW XX
internal oscillator calibration value.
512 Word
1024 Word
03FFh
0400h
On-chip Program
Memory
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